Phoenix Operatives (Couldn't find a good Photo)

Halcyon Operatives (Couldn't Find a Photo But they look like something else from Phoenix Operatives)

Combine Soldiers (With Guns Basically Like in Half Life 2)

War Robots (Search it up and it's all the robots you see or present)

Clone Troopers

Brothers In Arms 

Steel Cove (These Guys Basically the one with the mask has amour) 

A/N: This is it for now but i'll add more